Pressure-regulator



G. W. MANN. PRESSURE REGULATOR. APPLICATION FILED MAR. 14. 1918.

Patented Apr. 2%, 1920.

PATENT @FldlQE.

GEORGE W. MANN, OF PIERCE CITY, MISSOURI.

PRESSURE-REGULATOR.

Application filed March 14, 1918.

To all whom it may concern:

Be it known that I, GEORGE l/V. MANN, a citizen of the United States,residing at Pierce City, in the county of Lawrence and State ofMissouri, have invented a new and useful Pressure-Regulator, of whichthe following is a specification.

This invention relates to a pressure regulator for steam pumps, one ofits objects being to provide means whereby the supply of steam to thepump will be increased or reduced automatically thus to maintain theoperation of the pump uniform in spite of any variations in pressure inthe boiler.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can bemade within the scopeoi what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings Figure 1 is a front elevation of the governor;

Fig. 2 is a vertical transverse section on line 22 of Fig. 1, portionsof the pipes being shown in elevation; and

Fig. 3 is enlarged section on line 3-3 of Fig. 2.

Referring to the figures by characters of reference, 1 designates avalve easing into which opens a steam supply pipe 2 and a steam outflowpipe 3. A valve l is slidably mounted in the casing, its stem 5extending through the center of a cylindrical governor casing 6 one faceof which is provided with a dial, as indicated at 7. A collar 8 issecured to the stem 5 and a spring 9 bears at one end onthis collar andat its other end against the casing 6, thus to hold the valve 4:normally upon its seat.

A piston 10 is secured to the stem 5 and divides the interior of thecasing 6 into two compartments. One of these compartments is designed toreceive steam under pressure through a branch pipe 11 from the pipe 2.A. drain cook 12 may be employed whereby condensed steam can be drawnoii from the casing.

The forward end of the stem 5 is screw- Specification of Letters Patent.

Patented Apr. 20, 1920.

Serial No. 222,403.

threaded, as indicated at 13 and mounted on this threaded portion is thehand wheel 14. A spring 15 is interposed between the hand wheel and thedial 7 so that, when the hand wheel is turned in one direction, saidspring will be placed under increased compression and, as the spring 15is stronger than the spring 9, the valve 4 will thus be unseated. Anindex 16 is secured to the hand wheel and is adapted to work over thedial 7.

It will be apparent that under normal conditions, with the hand wheel 1at its outermost position, the spring 9 will overcome the spring 15 andcause the valve 4: to be seated so that pressure cannot pass from pipe 2to the pipe 3 through the valve cas ing 1. When the hand wheel 14: isrotated in one direction, the spring 15 is placed under increasedcompression, thus overcoming the tension ot the spring 9 and causing thevalve 4 to open; This will allow the steam under pressure to pass frompipe 2 to pipe 3. Should the pressure in the pipe 2 and, likewise in thecasing 6, become reduced, the pressure against the piston 10 willlikewise become reduced so that the spring 15, which is undercompression, will pull the piston 10 to the right, in Fig. 2, thusincreasing the flow of steam through the valve casing 1. Should thepressure increase, the piston 10 will be moved toward the left in Fig. 2thus to partly or entirely out down the flow of steam through the valvecasing 1. In view or" this arrangement it will be seen that the pump orother machine operated by the steam under pressure will be driven at auniform speed independent of any variation of pressure in the boiler.The index 16 cooperates with the dial 7 to indicate the position of thevalve 4; relative to its seat.

What is claimed is The combination with a valve casing and a cylindricalgovernor casing arranged s de by side, of a piston mounted to slidewithin the governor casing, a stem secured to the piston and slidablymounted within the two casings, a valve at one end of the stem andwithin the valve casing, a hand wheel adjustably mounted on the otherend of the stem, a spring interposed between the two casinos andengaging the stem for holding the valve normally in closed position, aspring interposed between the governor casing and the hand Wheel forovercoming the tension of the first named spring, said hand Wheel beingrevoluble to vary the compression of the spring engaging it, cooperatingmeans upon the hand Wheel and the overnor casing for indicating thedegree of compression, a pressure supply pipe, an outflow pipe extendingtherefrom and intersected by the valve casing, and a branch pipeextending from the supply pipe to the governor 10 caslng.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

GEORGE W. MANN W'itnesses WM. H. RHTEA, A. F. KEY.

